Home / 13,145.48-18,140.70-7,177.04

Finding the Fourth Proportional to 13,145.48, 18,140.70 and 7,177.04

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Solution

The fourth proportional to 13,145.48, 18,140.70 and 7,177.04 is: 9,904.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.48 : 18,140.70 = 7,177.04 : x
  2. Step 2: Convert to fraction form
    13,145.48/18,140.70 = 7,177.04/x
  3. Step 3: Cross multiply
    13,145.48x = 18,140.70 × 7,177.04
  4. Step 4: Simplify right side
    13,145.48x = 130,196,529.53
  5. Step 5: Solve for x
    x = 130,196,529.53/13,145.48
  6. Step 6: Final answer
    x = 9,904.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.